Lava Lamp Experiment

My children are still loving E-Science. The children were learning about the states of matter and density. One of the experiments involved layering oil, water, and using salt to create a lava lamp in a jar.

After putting water and oil in a jar, they sprinkled salt on top of the oil and watched the oil sink to the bottom, break free of the salt, and rise again to the top. They colored the water and watched what happened. They also watched what happened when they added more color drops to an already saturated salt water and then sprinkled more salt on top…